Bear Grylls it up

Term used to refer to a specific type of outdoor a activity, usually camping, but with a Man vs. Wild twist i.e. just sleeping under the stars tent-less, making a snow cave, etc. The suggestion is often immediately shot down because it is stupid.

Dude, all the rooms up at the lodge are full and the hotel are expensive.

Let's just Bear Grylls it up!

Are you fucking crazy? I'm not sleeping in a goddamn snow cave!